A laugh - A laugh is when your face gets so happy it feels like it's a

A laugh is when your face gets so happy it feels like it's about to do a backflip from pure joy.

I laughed so much when my dog chased my cat up a tree.

I laughed when my friend tried to do a dance move and tripped over his own feet.

I laughed when my little brother tried to wear my mom's wig to school.